I run 2 websites of the same niche and 1 is used to market off of customers that fall back on the main website. It actually works really good for my niche, but now all of a sudden my emails are going into the spam folder for recipents. I send a pretty personalized, straight forward email from my new website's email and it had a high return rate, but now it's going straight to spam folder for recipents (at least from what i've tested). How can I fix this? Should I use MailChimp or one of the other mass emailers as they're less likely to be reported as spam?